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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
Would be nice to have the code of the Node class, to know what to expect and specifically what solution implement.
Great Kata. Love the reference to matrix.